Swammerdamella grogani, Huerta, Herón & Ibáñez-Bernal, Sergio, 2008

Huerta, Herón & Ibáñez-Bernal, Sergio, 2008, New records of Scatopsidae (Diptera) from southeastern Mexico, and descriptions of new species of Swammerdamella Enderlein and Colobostema Enderlein, Zootaxa 1720, pp. 57-65: 62-64

publication ID

http://doi.org/ 10.5281/zenodo.181111

persistent identifier

http://treatment.plazi.org/id/600787E0-FFD6-FA41-5588-D3B5FA82FC00

treatment provided by

Plazi

scientific name

Swammerdamella grogani
status

sp. nov.

Swammerdamella grogani  sp. nov.

( Figs. 13–17View FIGURES 10 – 13View FIGURES 14 – 17)

Type material. HOLOTYPE male, labeled: MEXICO, Yucatan, Ria Lagartos Reserve, Municipio Tizimin, 1 km E Biological Station El Cuyo (21 º 30 ’ 35 ” N, 87 º 40 ’ 43 ” W), mangrove, 8 -VII- 1996, Malaise trap, HH, PMS, RPR, cols. ALLOTYPE female. Labeled: MEXICO, Yucatan, Reserve Ria Celestun, coastal dune (20 º 54 ’ 46 ” N, 90 º 22 ’ 49 ” W), 14-19 -VII- 1998, NTP trap, CNC, RPR, cols.

Description. Male. Head: Eyes with interfacet pubescence; narrowly separated medially by 4–5 facet diameters. Antennae brown with 7 flagellomeres, with abundant sensillae; distal flagellomere club-shaped, length 0.06 mm; flagellomeres 1–7 length 0.18 mm. Maxillary palpus brown, length 0.083 mm. Thorax: brown, scutum covered with sparsely short setae; supra-alar setae 10; anterior spiracular sclerite with 26 setae; anepisternum with 16 setae. Legs brownish; all femora and front and mid tibiae uniformly brown; hindtibia with basal brown band until midlength, the rest pale brown; all tarsi pale brown and claws strongly curved; empodia present. Wing length 0.97 mm, width 0.46 mm; membrane densely micropilose on whole surface ( Fig. 13View FIGURES 10 – 13). Veins R 1 and R 4 + 5 with irregularly arranged rows of short setae on dorsal surface ( Fig. 14View FIGURES 14 – 17); fork of M typical of the genus; CuA 1 and CuA 2 not reaching wing margin, CuA 2 curved; false vein present. Halter brown, with two setae on stem. Abdomen: tergite and sternite 6 unmodified; tergite 6 length 0.20 mm, width 0.26 mm; tergite 7 length 0.11 mm, width 0.15 mm ( Figs. 15–16View FIGURES 14 – 17), concave bearing a large median distally pointed spine-like process, and with a shorter upper process with sclerotized tip slightly expanded and truncate; sternite 7 length 0.15 mm; width 0.24 mm, anterior margin heavily sclerotized with shallow caudomedian excavation; a pair of spiracles on lateral lobes; coloration pattern and setae as figured. Intersegmental membrane with lateral groups of not specialized setae, and small horny projections in the middle; aedeagal plate spatulate, longer that wide, apically rounded; aedeagal-parameral complex with setose lateral arms anterolaterally directed; distinctive median process acute and convergent ( Figs. 17View FIGURES 14 – 17) (penis valve of Cook, 1956 a); lateral lobes setose, slightly developed (gonocoxite of Cook, 1956 a); distal portion arquate, pointed apically.

Female. Similar to male, but with the usual gender differences. Antennae brown with 7 flagellomeres, covered with abundant sensillae; distal flagellomere club-shaped; flagellomeres 1–7 length 0.13 mm. Maxillary palpus brown, length 0.10 mm. Wing length 0.97 mm; width 0.45 mm; membrane densely micropilose on entire surface. Veins R 1 and R 4 + 5 with irregularly arranged rows of short setae on dorsal surface. Tergite 8 band-shaped with the pair of spiracles; sternite 8 divided in two lateral lobes; sternite 9 apically rounded and situated between the lobes of sternite 8; genital fork triangular shaped; cerci small; spermatheca spherical, length 0.07 mm.

Comments. This Mexican new species closely resembles Swammerdamella obtusa Cook  and S. pusilla (Walker)  by the segment 7 of male. The Mexican species has the tergite 7 concave, bearing a shorter upper process with sclerotized tip slightly expanded and distally truncate; sternite 7 has anterior margin heavily sclerotized with a shallow caudomedian excavation and a pair of spiracles located laterally to lobes; in other species these characteristics are different. Another difference is that S. obtusa Cook  and S. pusilla (Walker)  have a modified tergite 6, while in S. grogani  sp.nov. is simple. Other similar Neotropical species is S. glochis Cook  , with a pair of spiracles located laterally on sternite 7, but without lateral lobes. Swammerdamella approximata Edwards (1924)  has the tarsi white, except for the last one or two blackish tarsomeres, while S. grogani  sp.nov. present a different pattern. The male terminalia are similar to other species, but some differences can be seen in the gonocoxite and the aedeagal plate. As pointed out by Cook (1956 a: 17), the male terminalia are small, and homologies are quite obscure. Maes (1993) referred an unidentified species of Swammerdamella Enderlein  from Nicaragua.

Distribution. Mexico (Yucatan).

Etymology. This species is named in honor of Dr. William L. Grogan Jr., Salisbury State University, Maryland ( USA), for his important contribution to the world knowledge of the family Ceratopogonidae  .

PMS

Prirodonamen Muzej Skopje

CNC

Canadian National Collection of Insects, Arachnids, and Nematodes